<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/lib/jquery.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/jquery.validate.min.js"></script>
<script src="https://static.runoob.com/assets/jquery-validation-1.14.0/dist/localization/messages_zh.js"></script>

<style>
.error{
	color:red;
}
</style>
</head>
<body>
    <form class="cmxform" id="signupForm" method="get" action="">
        <fieldset>
          <p>
            <label for="username">用户名</label>
            <input id="username" name="username" type="text">
          </p>
          <p>
            <label for="password">密码</label>
            <input id="password" name="password" type="password">
          </p>
          <p>
            <label for="confirm_password">验证密码</label>
            <input id="confirm_password" name="confirm_password" type="password">
          </p>
          <p>
            <input class="submit" type="submit" value="提交">
          </p>
        </fieldset>
      </form>
</body>

<script>
    $.validator.setDefaults({
        submitHandler: function() {
          alert("提交事件!");
        }
    });
    $().ready(function() {
        // 在键盘按下并释放及提交后验证提交表单
      $("#signupForm").validate({
        rules: {
          username: {
            required: true,
            minlength: 2
          },
          password: {
            required: true,
            minlength: 5
          },
          confirm_password: {
            required: true,
            minlength: 5,
            equalTo: "#password"
          }
        },
        messages: {
          username: {
            required: "请输入用户名",
            minlength: "用户名必需由两个字符组成"
          },
          password: {
            required: "请输入密码",
            minlength: "密码长度不能小于 5 个字符"
          },
          confirm_password: {
            required: "请输入密码",
            minlength: "密码长度不能小于 5 个字符",
            equalTo: "两次密码输入不一致"
          }
         }
        })
    });
    </script>
</html>
